I think they'd be the perfect breed for people who would get in trouble for having chickens. Seriously! They never sing that loud egg song, so you never have to worry about neighbors reporting you.
Mine hardly make a sound at all unless they feel like they've been wronged. ("Oh, no, you're not picking me up right!" "That was my nest box! I saw it first!" "Ow! Ow! She pecked me!" )